Holder for lighting units



R. D. VVARDELL HOLDER FOR LIGHTING UNITS Filed Dec. 6, 1920 g/ gum/whysPatented @et. 9, ilQEE.

i ROBERT D. VVARDELL, OF DETROIT, MICHIGAN.

." HOLDER FOR LIGHTING UNITS.

Application filed December 6, 1920.

To all whom it may concern.

Be it known that I, Bonner l). Viennnnn, a citizen of the United States.and resident oi Detroit, in the county of ayne and State of.ii'lichigan. have invented a certain new and useful improvement inHolders for Lighting Units, of which the following is a specification.

My invention relates to that class of de vices in which the lightingunit comprises a reflecting member and a bowl enamelled lamp. It is wellknown to persons skilled in the art that the most cflicient result ispro duced by a certain predetermined relationship between the bowlenamelled portion of the lamp and the reflecting member, and un lesssome means are provided for securing this, there is no way ofmaintaining an even efficiency for a lighting unit of this type.

My invention has for its object to provide an adjustable or telescopicholder which will accommodate various sizes of lamps, the necks of whichare of course in varying lengths owing to the size of the lamp, and hafor its further object to mount the reflector so that it may be hunglevel regardless of its unevenness, and also to facilitate its cleaning.

My means of accomplishing the foregoing objects may be; more readilyunderstood by having reference to the accon'ipanying drawings which arehereunto annexed and are a part of this specification in which Fig. 1 isa side elevation, a portion oi it being broken away to show theconstruction.

Fig. 2 is a side elevation, a portion of it being broken away to showthe construction, the holder in this view being adjusted to a largersize lamp bulb.

Similar reference numerals refer to similar parts throughout; the entiredescription.

As shown in the drawings, I have illustrated a lighting unit which isprovided with a bowl enamelled lamp 1 which may be mounted in a suitablesocket (not shown) and is surrounded by a reflecting member 3 which maybe of any suitable or desired configuration and formed otglass orsuitably coated metal. The reflector is provided with a central opening,the edge 4 of which loosely rests upon the lower portion of a flaringmember 5 which is a part of the adjustable holder.

It is invariably the case when a large reflector is blown, that one sideis'thicker than the other; hence, when suspended the intents andpurposes.

Serial No. 428,534.

unit will not hang true. I entirely overcome this defect by the loosemounting between the shade and holder as it makes it possible for theworkman to place the reflector so that it is absolutely horizontal. Theloose mounting also facilitates the cleaning as the reflector can beturned around on the holder so that all sides can be easily accessiblefrom one point.

This holder comprises the downwardly and outwardly flaring member 5which is provided with a plurality of holes 6 formed in the side wallsthereof to afford ample ventilation for the escape of the heat generatedby the lamp. By thus affording adequate and ample ventilation, the lifeof the lamp is greatly increased as it is well known to persons skilledin the art, that it rapidly deteriorates when the neck of the lamp isunduly heated.

The upper part of the member 5 is formed with a neck 7 terminating in alip 8 which is adapted to be engaged. by the screws 9 of the standardholder. Within this member 5 I mount a sleeve 10 which is fitted to andcoincides with the internal diameter of the neck 7 of the member 5, andis telescopically or slidably mounted there in. This cylindrical sleeve10 is formed with an outwardly extending flange 11 at its upper end anda similar flange 12 at its lower end, the lower flange being adapted toengage the shoulder 13 formed by the neck 7 on the member 5. When asmall lamp is employed, in a lighting unit, the sleeve is depressed intothe member 5 until the flange 11 rests upon the lip S as shown in Fig.1, and of course is not in use to all But when a larger lamp is wanted,then the sleeve 10 is drawn upwardly and outwardly as shown in Fig. 2until the lip 12 engages the shoulder 13 in which case the screws 9 ofthe holder engage the sleeve 10 just below the flange ll, thus servingto hold the unit securely in position.

It will be apparent that by this simple arrangement, I provide a holderwhich is adaptable for any standard holder provided with the usual thumbscrews and at the same time has provided simple and easily adjustablemeans for permitting the user to regulate his device to accommodatewhatever size lamp he desires to use.

In order to prevent loss of the light rays escaping upwardly from thelamp, and

which would otherwise enter the interior of the member 5 and be lost, Iprovide an annular reflecting member 15 which fills the space from thelower edge 16 of the member 5 to the neck of the lamp 1. This annularmember Liis preferably formed of reflecting material, although it willbe Ola-- vious that it may be coated with paint or any other suitablelight reflecting substance.

Having described my invention what I regard as new and desire to secureby Letters Patent is: A

1. In a device of the character described, the combination with anincandescent: electriclamp, ofa downwardly and outivardly flaringmember, the upper end ot'which is provided with a lip, said memberhaving a shoulder adjacent its smaller end, there being ventilatingopenings in said member, a cylindrical sleeve fitted to the internaldiameter oftlie said member at its smaller end and slidable therein, alip at each end or said sleeve, a reflector member of annular shapesecured to the lower end of said downwardly and outwardly flaringmember, the opening therein fitting the neck of the lamp.

2. In a device of the character described, the combination with anincandescent electric lamp, of a downwardly and outwardly flaringmember,the upper end of which is provided with a lip, said member having ashoulder adjacent its smaller end, there being ventilating openings insaid member, a cylindrical sleeve. fitted to the internal diameter ofthe said member at its smaller end means formed on said sleeve whichlimit its movement between predetermined points and an annulus formed ofreflective material secured to the large end or the downwardly" andoutwardly flaring member.

In testimony whereof, I have signed the foregoing specification. 3 I

ROBERT D. VARDELL,

